Abstract
The various luminescent properties of carbon nanodots (CDs) reveal fascinating applications in several areas. Here, bright and multicolor chemiluminescence (CL) is realized from CDs, whose CL quantum yield can be optimized by adjusting the energy level alignment between the CDs and 1,2‐dioxetanedione intermediate generated from the reaction of peroxalate and hydrogen peroxide. A CL quantum yield of 9.32 × 10−3 Einsteins mol−1, maximal luminance of 3.28 cd m−2, and lifetime of 186.4 s are achieved in red CDs, all of which are the best values ever reported for CDs. As a proof‐of‐concept prototype, a high‐quality information encryption strategy is established via CD based CL imaging techniques by virtue of the high brightness and multicolor CL.
Highlights
CL with light emission induced by energy transfer from chemical reactions, nating applications in several areas
Carbon nanodots (CDs) are emerging star systems like HNO2-hydrogrn peroxide (H2O2), NaIO4-H2O2, luminol-KMnO4, and Co(II)-H2O2.[33–39] very limited progress has been made in CD based CL concerning of carbon nanomaterials with unique properties, such as good brightness, efficiency, and multicolor emission because of the biocompatibility, high photostability, and tunable fluorescence. following challenges: i) CDs as emitting species in the CL reac
An efficient and multicolor emissive CDs based CL system has been demonstrated, in which blue, green, and red emissive CDs have been introduced as luminophors
Summary
Their high-resolution TEM (HRTEM) images reveal that all these three kinds of CDs show a wellresolved lattice spacing of 0.21 nm, which corresponds to the (100) crystallographic plane of graphitic carbon, indicating their high degree of crystallinity and similar core structures. The similar chemical constituents and structure reveal that the optical properties of the CDs are largely associated with different degree of graphitization and size of sp2-domains in the CDs.[11,20,41–47]
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